MATLAB: Do I receive an error when using the calling syntax stated in the documentation for FDESIGN.NYQUIST in Filter Desisgn Toolbox 3.2 (R14SP2)

designfdesignfilterFilter Design Toolboxnyquistspectype

I receive an error when using the syntax in the documentation for FDESIGN.NYQUIST in Filter Desisgn Toolbox 3.2 (R14SP2).

In the documentation for FDESIGN.NYQUIST, the following syntaxes are given:

d = fdesign.nyquist

d = fdesign.nyquist(spectype)

d = fdesign.nyquist(spectype,specvalue1,specvalue2, …)

d = fdesign.nyquist('tw,ast')

d = fdesign.nyquist(…,fs)

d = fdesign.nyquist(…,magunits)

The first syntax in this list works, but the remaining ones give the following error or a similar one:

 >> d = fdesign.nyquist('tw,ast')
 ??? Error using ==> fdesign.nyquist.nyquist
 The first input to fdesign.nyquist must be a scalar number.

Best Answer

This bug has been fixed in Release 14 Service Pack 3 (R14SP3). For previous product releases, read below for any possible workarounds:

This has been verified as an error in the documentation for FDESIGN.NYQUIST in the Filter Design Toolbox. The documentation should read as follows:

d = fdesign.nyquist

d = fdesign.nyquist(l, spectype)

d = fdesign.nyquist(l, spectype,specvalue1,specvalue2, ...)

d = fdesign.nyquist(l, 'tw,ast')

d = fdesign.nyquist(...,fs)

d = fdesign.nyquist(...,magunits)

where l is the Band.

Related Solutions

MATLAB: Do I receive an error message “Value must be a scalar” using the FDESIGN.DECIMATOR function in Filter Design Toolbox 3.3 (R14SP3)

This bug has been fixed in Release 2006a (R2006a). For previous product releases, read below for any possible workarounds:

This is an error in the documentation for FDESIGN.DECIMATOR in the Filter Design Toolbox 3.3 (R14SP3). To construct a CIC decimator, you have to specify the differential delay input argument, "d", for the CIC filter as well as the other input values. Here is the correct syntax adding the differential delay argument:

d = 1; %Differential delay.
s = fdesign.decimator(5,'CIC',d, 'fp,ast',0.55,55);

Note the additional input argument "d" used to specify the differential delay immediately after the CIC argument string. The examples in the documentation are otherwise correct.

MATLAB: Matlab Upsample Filter Object

Hi Morgan,

You can do this by setting Numerator of interpolator to [1,0]. For example, using the dsp.FIRInterpolator System object:

>> interp = dsp.FIRInterpolator;
>> interp.InterpolationFactor = 2;
>> interp.Numerator = [1,0];
>> x = (1:5)';
>> step(interp, x)
ans =
       1
       0
       2
       0
       3
       0
       4
       0
       5
       0

Best Answer

Related Solutions

MATLAB: Do I receive an error message “Value must be a scalar” using the FDESIGN.DECIMATOR function in Filter Design Toolbox 3.3 (R14SP3)

MATLAB: Matlab Upsample Filter Object

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